IMPROVED SUN VISOR STRUCTURE FOR MOTOR VEHICLES

Abstract: The improved sun visor structure for motor vehicles is comprised of a fixing device (2) and a support (3) anchored to respective fixed points ( F1, F2 ) of the structure of the motor vehicle, and to which is coupled a sun visor (1) wherein are incorporated a reinforcing metal rod (5), a hinge (6) and a securing bridge (7). In the support pin (9) of the device (2) coupled to the hinge (6) of the sun visor (1), and in the bolding pin (14) of the bridge (7) coupled to the support (3), there are provided respective weakening grooves (11, 15). In the case of a collision, the breaking of said pins (9, 14) at the points corresponding to the weakening grooves (11, 15), causes the sun visor (1) to break free from the structure of the vehicle. Application to the car industry.

Description: Field of the Invention The object of the present invention is an improved structure for sunvisors which is intended, specifically, to increase the safety of automobile occupants in the event of collision. Background of the Invention A wide variety of embodiments of sunvisors for automobiles are well known, generally based on a body obtained by injecting a material of low specific gravity, such as polyurethane, incorporating a frame for reinforcing the structure, consisting of a metal rod whose shape is similar to that of the outline of the sunvisor body, and which is firmly attached to a hinge and a hanging bridge. As is also well known, the sunvisor is attached by one of its ends to an attachment device generally comprising a base member and a bent supporting pivot, while its other end is attachable to a support fitted for the purpose, with both the device and the support being anchored on their respective fixed points on the structure of the automobile. The sunvisor is fitted to the attachment device by means of the supporting pivot and in such a way that the vertical arm of the supporting pivot remains housed in said base member and the horizontal arm of the supporting pivot remains housed in the sunvisor's hinge. This means of fitting enables the sunvisor to be turned around the base member of the attachment device and around the horizontal arm of the supporting pivot, and so the sunvisor can be moved by the user to any of its normal positions for use, remaining stable in any of those positions owing to the mutual action of the positioning means incorporated in both the supporting pivot of the attachment device and the sunvisor's hinge. The purpose of fitting the sunvisor to the support attached to the structure of the vehicle via the hanging bridge is to avoid any mechanical overloads on the attachment device under normal conditions. By way of example of a known embodiment for attachment devices for sunvisors in automobiles, Spanish patent P 9201316 may be cited, it disclosing a device comprising, apart from those items that characterize it, a base member and a bent supporting pivot. And, as a known embodiment of the hanging bridge for sunvisors such as those described in automobiles, Spanish patent P 9101388 may be cited, it disclosing a hanging bridge comprising a sliding body and a retaining body, these two being inter-attachable and attachable to the aforementioned metal rod, and a structurally independent pin which stands clear of the sunvisor and is attachable to the support attached to the structure of the vehicle. From the above, it transpires that when the sunvisor is fitted to the attachment device and to the support, by means of the hinge and the hanging bridge respectively, the sunvisor forms a whole with the structure of the automobile through the supporting pivot of the attachment device and through the pin of the sunvisor's hanging bridge. Under these circumstances, in the event of collision, if the vehicle's occupants, particularly those travelling in front, are thrown against the sunvisor, the rigidity and high strength of the coupling of the sunvisor to the vehicle structure may, under certain circumstances, result in injury. Summary of the Invention With a view to contributing a solution of very low cost to this risk factor deriving from the rigidity and strength of the means used in attaching the sunvisor to the vehicle's structure, increasing the safety of the occupants, an improved sunvisor structure is disclosed. The improved sunvisor of this invention comprises the following known elements. A sunvisor consisting of a body made by injection-moulding a material such as polyurethane in which is incorporated a metal reinforcing rod, an attachment device and a support. Therein, the attachment device comprises a base member anchored to the structure of the vehicle and a bent supporting pivot, made in plastic materials, one of whose arms - the vertical one - is attachable to the base member, and the other arm - the horizontal one - is attachable to the sunvisor; the sunvisor, which may be of any design and finish in keeping with the vehicle's interior, comprising a hinge that is suitably sized for receiving the horizontal arm of the supporting pivot of the attachment device; and a hanging bridge incorporating a pin, also made in plastic materials, which stands clear of the sunvisor and is attachable to the support anchored to the vehicle's structure; all in such a way that the sunvisor may be turned around the base member of the attachment device and around the horizontal arm of the supporting pivot of this device, taking up, in a stable manner, through the action of the positioning devices said device and hinge possess, any position selected by the user from among those commonly used. The improved sunvisor structure of this invention is characterized in that the vertical arm of the supporting pivot of the attachment device and the pin of the hanging bridge each have a transverse weakening groove which significantly reduces their cross-sections without interfering with their working under normal conditions of use. Preferably, the transverse weakening groove on the vertical arm of the supporting pivot of the attachment device is located, internally, at a relatively short distance from the external surface of the base member, and the transverse weakening groove on the pin of the hanging bridge is located in the part which stands clear of the sunvisor or the external part of the pin. Another characteristic of the improved sunvisor structure of this invention is the fact the transverse weakening grooves of the supporting pivot and the pin go all around or partly around the perimeter of that pivot and that pin. The features described for the improved sunvisor structure of this invention contribute a low-cost solution to the risk factor posed in general by the rigidity and strength of the attachment of known embodiments of sunvisor structures, such as those described, to the structure of the automobile. For indeed, in the event of collision, with the occupants of the vehicle being thrown against the improved sunvisor structure of this invention, only a small part of the impact energy would suffice to break both the supporting pivot of the attachment device and the pin of the hanging bridge at their points of least resistance, which are determined by the location of the weakening grooves. Consequently, the sunvisor detaches itself from its location owing to losing its link with the vehicle structure, thus ceasing to be a rigid obstacle capable, under certain circumstances as previously described, of causing injury to the occupants of the vehicle. Brief description of the drawings The sheet of drawings accompanying this specification shows the improved sunvisor structure of this invention. In those drawings: Figure 1 is a side view of the improved sunvisor structure of this invention. Figure 2 is a partial side view of the supporting pivot of the sunvisor's attachment device. Figure 3 is a partial side view of the pin of the sunvisor's hanging bridge. Detailed description of the embodiment The improved sunvisor structure of this invention, which as an example of embodiment is here described, comprises, as shown in Figure 1, the sunvisor 1, the attachment device 2 and the support 3. All these items shown in Figure 1 are given only as a non-restrictive example, since they may take on other forms and layouts with respect to each other without this affecting the essence of the invention. Figure 1 shows how the sunvisor 1 comprises, basically, the body 4, which is injection-moulded in a light material such as polyurethane, which incorporates the metal rod 5, shown schematically by dotted lines, which acts as a structural reinforcement for the body 4 in order to prevent deformations when the user handles the sunvisor 1. The metal rod 5 is closed in shape, being very similar to the shape of the body 4, and at its longitudinal ends are fitted the hinge 6 and the hanging bridge 7 which, like the metal rod 5, have been schematically represented by dotted lines. It is worth pointing out here that the sunvisor 1 may incorporate any additional item such as, for example, the so-called vanity mirror, this likewise not affecting the essence of the invention. Figure 1 shows how the sunvisor 1 is linked to a fixed point F1 of the automobile's structure by means of the attachment device 2, which comprises, basically, the base member 8, attached to said point F1 , and the supporting pivot 9 which is shown in part and in greater detail in Figure 2, this base member 8 and this supporting pivot 9 being made preferably in plastic materials. The supporting pivot 9 is bent in shape, with its vertical arm 9v being attached to the base member 8, and its horizontal arm 9h being attached to the hinge 6 of the sunvisor 1. These attachments enable the sunvisor 1 to be turned around the base member 8, by means of the axis of rotation defined by the vertical arm 9v , and around the horizontal arm 9h , in such a way that the user may set the sunvisor 1 to any of its normal positions for use. In addition, these attachments possess means of positioning, such as the positioning flat 10 on the horizontal arm 9h of the supporting pivot 9 shown in Figure 2, which prevent, under normal conditions of use, the sunvisor 1 from departing in an uncontrolled fashion from the position set by the user. Figures 1 and 2 show how the vertical arm 9v of the supporting pivot 9 has its weakening groove 11, which, as shown in more detail in Figure 1, is arranged internally at a relatively short distance from the outer surface of the base member 8. Figure 1 shows how the sunvisor 1 is also attached to the fixed point F2 of the automobile's structure by means of the support 3 which is attached to said point F2 . The sunvisor 1 may be attached to the support 3 by means of the hanging bridge 7 which, in this embodiment of the improved sunvisor of this invention comprises, basically, the retaining body 12, the sliding body 13 and the pin 14, made preferably in plastic materials. Figure 3 shows in greater detail how the central section of the pin 14, which is the section of the pin 14 that stands clear of the sunvisor 1, has its weakening groove 15 cut centrally. Both weakening grooves 11 and 15, on the supporting pivot 9 and the pin 14 respectively, may be of any cross section, such as a U-section, and may affect wholly or in part the perimeter of said supporting pivot 9 and pin 14, depending on the determining factors present in each specific application, e.g. the size of the sunvisor 1 or the material in which the supporting pivot 9 or the pin 14 are made. In any event, the weakening grooves 11 and 15 are so sized as not to affect the operation of the sunvisor 1 under normal conditions of use. Consequent upon the foregoing, in the event of a collision in which the occupants of the vehicle are thrown against the sunvisor 1, a small part of the impact energy will suffice to break both the supporting pivot 9 and the pin 14 at the point where the weakening grooves 11 and 15 are located, the sunvisor 1 thus detaching itself from the fixed points F1 and F2 of the vehicle structure, and the sunvisor 1 thus ceasing to be a rigid obstacle and preventing it, as previously stated, from causing, under certain circumstances, injury to the occupants of the vehicle.

Claims: An improved sunvisor structure which comprises a sunvisor (1) consisting of a body (4) made by injection-moulding a material such as polyurethane and in which are incorporated a metal reinforcing rod (5), an attachment device (2) and a support (3), in which: the attachment device (2) comprises a base member (8) anchored to a fixed point ( F1 ) of the structure of the vehicle, and a bent supporting pivot (9), made in plastic materials, one of whose arms - the vertical one ( 9v ) - is attachable to the base member (8), and the other arm - the horizontal one ( 9h ) - is attachable to the sunvisor; the sunvisor (1), which may be of any design and finish in keeping with the vehicle's interior, comprises a hinge (6) that is suitably sized for receiving the horizontal arm ( 9h ) of the supporting pivot (9) of the attachment device (2) and a hanging bridge (7) incorporating a pin (14), also made in plastic materials, which stands out from the sunvisor (1) and is attachable to the support (3) anchored to a fixed point ( F2 ) of the vehicle's structure, in such a way that the sunvisor (1) may be turned around the base member (8) of the attachment device (2) and around the horizontal arm ( 9h ) of the supporting pivot (9) of this device (2), taking up in a stable manner, through the action of the positioning devices said device (2) and hinge (6) possess, any position selected by the user from among those commonly used; and it is characterized in that: the vertical arm ( 9v ) of the supporting pivot (9) of the attachment device (2) and the pin (14) of the hanging bridge (7) each have a transverse weakening groove (11, 15) which significantly reduces their cross-sections without interfering with their working under normal conditions of use. A sunvisor structure according to claim 1), which is characterized in that the transverse weakening groove (11) on the vertical arm ( 9v ) of the supporting pivot (9) of the attachment device (2) is located, internally, at a relatively short distance from the external surface of the base member (8). A sunvisor structure according to claims 1) or 2), which is characterized in that the transverse weakening groove (15) on the pin (14) of the hanging bridge (7) is located in the part of the pin (14) which stands clear of the rest of the sunvisor (1) or external part of the pin (14). A sunvisor structure according to any of claims 1) to 3), which is characterized in that the transverse weakening grooves (11, 15) of the supporting pivot (9) of the attachment device (2) and the pin (14) of the hanging bridge (7) go all around the perimeter of that pivot (9) and that pin (14). A sunvisor structure according to any of claims 1) to 3), which is characterized in that the transverse weakening grooves (11, 15) of the supporting pivot (9) of the attachment device (2) and the pin (14) of the hanging bridge (7) go part of the way around the perimeter of that pivot (9) and that pin (14).

Inventors: AYMERICH MUNOZ JOSE, PRAT CASTAN JESUS, AYMERICH MUNOZ, JOSE, PRAT CASTAN, JESUS, AYMERICH MUNOZ, José, PRAT CASTAN, Jesús
Applicants: FICO ITM SA, FICO I.T.M., S.A.
Application year: 1994
Main classification: B60J3
IPC codes: B60J3